Dyeing synthetic polyamide fibers with disulfonated diaryl bis axo carbonilides

ABSTRACT

&#39;&#39;&#39;&#39;A process for dyeing or printing polyamide fibers with dyes of the formula WHERE R stands for methyl or ethyl, or with dyes of the formula OR THEIR WATER-SOLUBLE SALTS.

United States Patent Schweizer 1 Feb, 22, 1972 [72] Inventor: August Schweizer, Muttenz, Switzerland [73] Assignee: Sandor Ltd. (also known as Sandoz A.G.),

Basel, Switzerland 22 Filed: Sept. 30, 1968 [21] Appl.No.: 763,925

[30] Foreign Application Priority Data Oct. 25, 1967 Switzerland ..l5022/67 [52] U.S.Cl ..8/41, 8/178, 8/21 E, 8/25, 8/26, 260/175 [51] Int. Cl. ..D06p 1/20 [58] Field otSearch ..8/l78,41;260/175 [56] References Cited UNITED STATES PATENTS 935,016 9/ 1909 Gunther et al ..260/175 935,017 9/1909 Gunther et al.... ..260/175 935,018 9/1909 Gunther et al.... .260/175 2,666,757 1/1954 Richter ...260/175 Stanton et al ..8/178 X OTHER PUBLICATIONS Schmidlin, Prep. & Dye. Syn. Fibres, 1963, p. 200. AATCC Tech. Man., 1968 Ed., Vol. 44, p. B 59 Color lndex, Vol. 2, 1956 Second Ed., p. 2018.

Primary Examinerl)onald Levy Assistant ExaminerPatricia C. Ives Attorney-Irwin Morton Aisenberg [5 7] ABSTRACT A process for dyeing or printing polyamide fibers with dyes of the formula sont 2 (l) where R stands for methyl or ethyl, or with dyes of the formula or their water soluble salts.

OCHs

f fQ v s on; (u

10 Claims, No Drawings DYEING SYNTHETIC POLYAMIDE FIBERS WlTl-l DISULFONATED DIARYL BIS AXO CARBONILIDES This invention relates to a process for dyeing or printing synthetic polyamide fibers with dyes of the formula OCH;

where R stands for methyl or ethyl, or with dyes of the formula 1 ,peratmospheric pressure, in dry heat, or by cold batching or l 2 (or their water soluble salts. Symmetrical of asymmetrical dyes;

acid and e-carprolactam. The dyes of formulas (I) and (II)! may be applied as free sulphonic acids or as water soluble lsalts, preferably the alkaline salts, of these acids. They can be, emp1oyed as liquid preparations containing, per 1 part by :weight ofdye, 1 to 8 parts by weight ofwater and 0.5 to 5 parts. by weight of an acid amide, e.g., urea, or as solid dye prepara-l tions containing a granulated dye with an average particle sizel ,of 20 microns which is soluble to at least 2 percent in water at 125 C. and a maximum of percent of one of the salts nor-= mally used for dye preparations which dissociate in water, e.g.,;

Glaubers salt. 1 4

These liquid and solid dye preparations are suitably diluted with water before addition to the dyebath or printing paste.

The dyes are used according to normal exhaustion and con- 'tinuous dyeing processes with excellent results. Similarly, ex-l cellent prints are obtained on polyamide fibers using the stan dard printing processes. Carpets can be successfully dyed with; these dyes. The dyes are generally applied from weakly alkaline to strongly acid medium at pH values of l to 8 or, preferably, 3 to 7. The best temperature range for application is -100 C. or, at increased pressure, above C. (in high temperature processes to about C.); the dyeing times range from about 30 to minutes. The dyebath may be set with the nor mal dyeing assistants, for example organic or inorganic acids,

such as acetic, formic or sulphonic acid; neutral salts, such as 60 sodium sulphate; anionic compounds, such as sodiumdimethylmethane disulphonate or highly sulphonated castor oil; or nonionic compounds, such as alkyl-polyglycolor alky laryl-polyglycol ethers, the reaction products of alkyl amines or fatty acid amides and ethylene oxides. These additions are employed to promote level dyeing or to correct the tendency to barry dyeing due to affinity differences in the substrate.

Further, the dyebath may contain aromatic and/or aliphatic alcohols, e.g., ethanol and benzyl alcohol, or assistants which form a coacervate. The dyes are useful for the pad-batch process. The liquor ratios generally range from 1:3 to 1:60, the optimum ratio being 1:30.

The dyes may be applied in mixture with each other or with other dyes, e.g., other anionic, or acid, premetallized, reactive or basic dyes.

The printing pastes can be prepared with any of the normal assistants, for example solvents for dyestuffs, preferably those giving an increase in depth of dyeing, such as urea, vthiodiethylene glycol, guanidine, benzyl alcohol, butylcarbitol, phenol or resorcinol. They may contain further swelling agents which, depending on the composition of the substrate, permit very heavy shades to be produced; examples are thiourea, phenol and resorcinol. Acid donors, such as ammonium 1 0 tartrate, and thickening agents, such as locust bean and crystal gum, starches, starch decomposition products and alginates, are other suitable additions. Printing, pastes may also contain an agent which forms a coacervate, e.g., alkylarylpolyglycol ether or one of the reaction products of alkylamines or fatty 5 lacid amides and ethylene oxides. The printing pastes can be applied in the form of emulsions by roller, screen or other printing processes.

The dyes can be fixed by any of the known methods, e.g., with saturated or superheated steam, at atmospheric or suinfrared radiation. After fixation the prints are finished in the normal way.

The dyeings and prints obtained are of very bright shade and have good fastness to light and wet tests, such as water,

5 (washing and perspiration. The dyes have good power of buillidup on substrates of .widely different affinity, which means that very heavy dyeings can be produced with small amounts. Dyes of formulas (l) and (11) can be dyed in combination with blue dyes without the dyeings showing catalytic fading; these combination dyeings fade tone-in-tone.

1n the following examples the parts and percentages are by weight and the temperatures in degrees centigrade.

EXAMPLE 1 A printing paste is prepared with 6 parts of the dye of formula .390 parts of water, 450 parts of 8 percent aqueous locust bean thickening, 60 parts of thiourea and 60 parts of a 30 percent aqueous ammonium 40 solution. The paste is roller printed on 50 a woven fabric of nylon 66 fiber, and after drying the print is fixed for 20 minutes at 102 in a continuous steamer, washed off and dried. A deep yellow print with good light and wet fast ness properties is obtained.

EXAMPLE 2 percent aqueous ammonium sulphate solution. This paste is roller printed on a smooth fabric of nylon 66 fiber. The print is dried, fixed, washed off and dried as outlined in Example 1. A

65 yellow print with good fastness properties is obtained.

EXAMPLE 3 The emulsion is screen printed on a fabric of texturized nylon 6 (Perlon) fiber, and the print is dried, fixedfor 40 minutes in saturated steam at normal pressure, and washed off. A print of deep yellow shade is obtained which presents an even appearance on the surface of the texturized, by lky fabric,

EXAMPLE 4 1.5 Parts of the dye used in Example 1 are mixed with 630 carpet of cold water and the mixture is stirred into 330 parts of a 4 percent aqueous solution of etherified locust bean gum and 20 parts of concentrated acetic acid. Finally 10 parts of nonylphenyl polyglycol ether with an ethylene oxide content of 4-6 is added to convert the solution into an emulsion. The emulsion is screen printed on a tufted carpet of nylon 66 fiber, and, without intermediate drying, the print is fixed for 8 minutes in saturated steam at normal pressure.-The CARPET is washed off and dried in the normal way. It is printed in a yellow shade which has very good fastness properties.

EXAMPLE 5 3 Parts of the dye of Example 1 are stirred into 450 parts of cold water and mixed with 500 parts of a 4 percent aqueous solution of sodium alginate thickening and 20 parts of crystallized ammonium sulphate. Parts of nonylphenyl polyglycol ether with an ethylene oxide content of 4-6 are added to convert the solution into an emulsion. The emulsion is roller printed on a loosely knitted fabric of texturized nylon 66 fiber and, without intermediate drying, the print is fixed by steaming for 3 minutes and washed off. The fabric is unraveled and the partially printed yarns used to produce tufted carpet with space dyed effects.

EXAMPLE 6 A dyebath is set with 0.4 parts of the dye used in Example 1 and 2,000 parts of water, and 100 parts of a fabric of polyamide fiber are dyed in it for 1 hour at 95-l00. A yellow dyeing is obtained which has very good light and wet fastness.

Depending on the nature of the substrate, deep, fast dyeings and excellent color yield can be obtained with the aid of the following assistants: for jig and winch dyeing at a liquor ratio from 1:1 to 1:80 or, preferably, 1:10 to 1:30, amounts of up to 8 parts on the weight of the fiber of a sulpho-oleate, sulphonated to 99 percent, or amounts to up to 35 grams per. litre of an alcohol, e.g., benzyl alcohol. The pH of the dyebath can be adjusted to l to 8 or, preferably, 3 to 8 with, e.g., am monium sulphate, ammonia, acetic or formic acid.

EXAMPLE 7 100 Parts of a carpet of nylon 66 fiber are exhaustion dyed for 2 hours at 95-l00 and pH 6-65 in a bath of 4,000 parts of water, 0.2 part of the dye used in Example 1 and 3 parts of monosodium phosphate. The yellow dyeing on the carpet has excellent light and wet fastness.

EXAMPLE 8 The exhaustion dyeing method of Example 7 can be employed for dyeing carpets, woven fabrics or knit goods made of differential dyeing yarns, i.e., polyamide yarns having different degrees of dyeability with anionic dyes.

EXAMPLE 9 3 Parts of the dye used in Example 1 and 20 parts of urea are dissolved in 396.5 parts of water, and 2 parts of locust bean gum are strewn into the solution. To the resulting paste are added 3 parts of laurylglycol ether sulphonate containing 3 moles ethylene oxide groups, 3 parts of nonylphenyl polyglycol ether containing oxide groups, 3 parts of nonylphenyl polyglycol ether containing 4-5 moles ethylene oxide groups, and 5 parts of glacial acetic acid. A tufted carpet of nylon 66 fiber is saturated with this solution and then passed between squeeze rollers to retain 130 percent of its weight of the liquor. The dye is then fixed for 5 minutes at in saturated steam. A deep, fast yellow dyeing with good fastness properties is obtained.

EXAMPLE 10 2.5 Parts of the dye specified in Example 1 are dissolved in 396.5 parts of water; 2 parts of locust bean gum are strewn into the solution, followed by 2 parts of laurylglycol ether sulphonate containing 2 moles ethylene oxide groups, 2 parts of nonylphenyl-polyglycol ether containing 4.5 moles ethylene oxide groups, and 5 parts of glacial acetic acid. The solution is made up to 1 litre with water. A carpet of nylon 66 fiber is padded with this liquor, expressed to contain 300 percent of its weight of the liquor, and fixed in saturated steam for 5 minutes at 100. A fast, deep yellow dyeing with good fastness properties is obtained.

This padding method can be employed for a carpet made of yarns having different degrees of affinity for dyes. Attractive differential dyeing effects are obtained in this way. The degree of differentiation can be increased by fixing the dyeing in saturated steam in the wet state without intermediate drying.

EXAMPLE 1 l A dyebath is prepared with 5,000 parts of water, 1 part of a dyeing assistant consisting of a mixture of the reaction product of 10 moles ethylene oxide and 1 mole 3-stearyloxy-2-hydroxy-propyldi-ethylene-triamine and oleyldecaglycol ether-oxy acetic acid, 3 parts of monosodium phosphate, 2 parts of the dye given in Example l and 1 part of the basic dye of formula GHKSOl ,yarn, blue.

The dye bearing sulphonic acid groups which is used in Examples l to 11 can be replaced by one of the dyes of the following formulas, which give more greenish yellow dyeings wi @532? ssiie Properties- S an OCH;

where R presents methyl or ethyl, with dye of the formula 2. A process according to claim 1, in which the dye is symor with water-soluble salt of either.

metrical dye of formula (II).

3. Synthetic polyamide fiber dyed according to claim ll.

4. A process according to claim 1 wherein the dye is dye of the formula OOH:

GHQ

OOHa

s 03H (II) 5. A process according to claim I wherein the dye is dye of the formula OCHJ 6. A process according to claim 1 wherein the dye is dye of the formula OCH:

OCHa

7. A process according to claim 1 wherein the dye is dye of the formula S OaNa OCH;

OJMQWJ S OaNa 2 8. A process according to claim 1 wherein the water-soluble salt is an alkaline salt.

9. A process according to claim 8 wherein the alkaline salt is a sodium salt.

10. A process according to claim 1 for dyeing or printing synthetic polyamide fiber, the polyamide being selected from the group consisting of condensation products of l,6-hexamethylene-diamine and adipic acid or sebacic acid, of polymerization products of e-caprolactam, of condensation products of w-aminoundecanoic acid or of mixed condensation products of l,6-hexamethylene-diamine, adipic acid and e-caprolactam, with dye of the formula OCH (I) CH1 wherein R is methyl or ethyl, or with dye ofthe formula OCHa O CH: 0 l

or water-soluble alkali metal salt of either.

Po-w50 I UNITED STATES PATENT OFFICE 5 9 CERTIFICATE OF CORRECTION Patent No. 3,643,269 Dated Februarf 22, 1972 In'vetofls) AUGUST SCHWEIZER d It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Title page, line 3 of the Abstract, in the formula, "NH]-CO" should read NH-]- CO; line 5, delete "or their water soluble salts". line 7,

beneath the formula, insert or their water soluble salts".--. Column 1,

line 9, in the formula, "NH]-- -CO" should read -'NH-]- CO; line 26, "of

asymmetrical" should read -'-or asymmetrical; line 33, "W-" should read w- Column 2, line 40, in the formula, "NH]CO" should read NH CO,; line 49 "40 solution," should read tartrate solution.

Column 3 line 9 "carpet" should read -parts; line 16, "CARPET" should read carpet; lines 71 and 72, delete "3 parts of nonylphenyl polyglycol ether containing oxide groups,". Column 5, line 12, in the formula, "H0 8" should read HO 8- line 25 in the formula, "Q" should read Iv OCH Claim 1, line 3, in the formula "NH-]--C0" should read OCH 3 l NH-]- CO; "(I)" should read (I) line 4, "presents" should read represents-. Claim 4, line '4, in the second part of the formula, "0 should read 0 Claim 5, line 4, in the second part of the W050 UNITED STATES PATENT OFFECE CETIFICATE 0F C 2' Ei ECTIN Patent No. 3,643,269 Dated February 22, 1972 Inventor) AUGUST SCHWEIZER 2 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

formula, "0 should read Claim 6, line 4, in the second part C-HN- C-HN- of the formula, '0 should read O Claim 7, line 3, in the formula, "NH--CO" should read -,--NH++ CO Claim 10, line 9, in the first part of the formula, "C()" should read CO- line 10, in the second part of the formula,- "NH" should read NH- "Q should I i v SO H v I read line 12., in the first part of the formula, should I Y 50 H d I f 3 3 3 read p g "(I)" should'reiad -(I):,--; line 13, in the second part SOBH j v v I of the formula, "0 should read ----0 Signed and sealed this 1st day of May 1973,

L (SEAL) Attest:

EDWARD M. FLETCHER, JR. ROBERT GOTTSCHALK Atte sting Officer I 1 Commissioner of Patents 

2. A process according to claim 1, in which the dye is symmetrical dye of formula (II).
 3. Synthetic polyamide fiber dyed according to claim
 1. 4. A process according to claim 1 wherein the dye is dye of the formula
 5. A process according to claim 1 wherein the dye is dye of the formula
 6. A process according to claim 1 wherein the dye is dye of the formula
 7. A process according to claim 1 wherein the dye is dye of the formula
 8. A process according to claim 1 wherein the water-soluble salt is an alkaline salt.
 9. A process according to claim 8 wherein the alkaline salt is a sodium salt.
 10. A process according to claim 1 for dyeing or printing synthetic polyamide fiber, the polyamide being selected from the group consisting of condensation products of 1,6-hexamethylene-diamine and adipic acid or sebacic acid, of polymerization products of epsilon -caprolactam, of condensation products of omega -aminoundecanoic acid or of mixed condensation products of 1,6-hexamethylene-diamine, adipic acid and epsilon -caprolactam, with dye of the formula wherein R is methyl or ethyl, or with dye of the formula or water-soluble alkali metal salt of either. 